Concrete-tamper.



Patented Nov. 7, 1916.

3 SHEETSSHEET I.

ATTORNEYS I E. G. CARR.

CONCRETE TAMPER.

APPLICATION FILED JUNE 22, 1915. I Patented NOV. 7,

3 SHEETS-SHEET 2 v WIT/IEISSES: I l/III/E/VJUR Wm, [2/7/5971 6: 5/7/17? E. G. CARR.

CONCRETE TAMPER.

APPLICATION FILED JUNE 22,1915.

1 ,2%.,245 Patented Nov. 7,1916.

3 SHEETSSHEET 3. N

WITNESSES:

arm

A TTOR/VE VS of Oceanside, in the county of San Diego an s ra ras ra rnn r cannon.

EDWARD GEORGE CARE, OF OCEANSIDE, CALIFORNIA.

To all whom it may concern v l v:

Be it known that LEDWARD G. CAnR, a citizen of the United States, and a resldent and State of California, have invented a;

'certain new and useful Improvement, in

Concrete-Tampers, of which the following is a specification.

My invention relates to improvements in tamping devices used'in-constructing concrete roads or beds, and has for an object to utilize the various vibrations of a power driven shaft carrying an e'ccentrically mounted weight to impart a horizontal motion to one tamper templet or blade and a vertical movement to another templet or novel features of construction, arrangement and combination of parts as will be hereinafter described and pointed out in the claims, reference being had to the accompanying drawings, in which: 85

Figurel is a top plan view showing an embodiment 'of my invention. Fig. 2 is a vertical section on line 22 of Fig. 1. Fig. 3 isa section on line 33 of Fig. 1. Fig. i is a section on line %14 of Fig. '1. Fig. 5 is a section on line 5-5 of Fig. 1. Fig.- 6 is a section on line 6-6 of Fig. -1. Fig.

7 is a section on line 7-7 of Fig. 1. Fig. 8

is an enlarged section showing one of the clutch members engaged. 0 p In carrying out my invention a sultable frame F is used, mounted on the drive wheels G and the front guide wheels G. At the forward end of the frame the tamping templets A and A are suspended, the front templet or blade having a resilient connection with the bearingof the front wheels G at each side by means of the springs S as shown plainly in Figs. 1, 2 and 3; this templet or blade 1s also suspended from the frame by the chains 1 rig- Specification of. Letters Patent.

A cononn'rn ramrnn.

Patented Nov. "3,1913.

Application filed June 22, 1915. Serial No. 35,576.

idly secured to the rock shaft Iin such. a

manner that turning of said rock shaft by a the hand lever L will raise or lowersaid blade A. Templet or blade A is also suspended by chains I rigidly securedto the rock shaft 1 which carries a hand lever L1,

similar to.lever L and manipulated inthe same manner; templet or blade A is also res1l1ently suspended from frame F by the" curved springs S one end being secured to a the frame and the opposite end bent back and secured to the templet or blade A at .or Y

near each outer end, as plainly shown in Fig. 5. The blades A and A are both also suspended from the shaft B which has a ball and socket bearing B at one end and adjacent its front the pitman P which is connected to the blade A in such manner as-to impart a longitudinal .movement to said blade, or across the road bed, when shaft-B is revolved; spaced apart from blade A the blade A is suspended from shaft B by the solid pitman P extending" upwardly from the" shaft and a cross pin P connecting the angular-brackets 3P spaced apart and se-" of said blade A as shown in Fig. 5 blade A-is further supported'by the brace rods K which have-a pivotal Orhinged connection with the axle of wheel G. Up'on shaft B but between the templets or blades A and A is ec'centrically mounted the weight W as illustrated in Figs. '1, 2 and 7; shaft B is driven from the-main shaft of the engine by pulleys and belts and a clutch C on shaft B, the engine used being of any suitable type, and from the crank shaft of the engine power is belted OH to a shaft D which has a worm D meshing with gear D on the .shaft D extending across the frame and carrying at its outer end on both sides the sprocket gears I) each carrying a clutch member D adapted to'engage themating clutch memberl l) actuated by levers D when it is desired to throw theengine into and out of gear with'the driving wheels of the truck; the said rear wheels G have mounted at their outer sides sprockets G to be driven by a sprocket chain G running overthe sprocket on. the shaft D: the shaft 105- D, it will be noticedc'arries means for driv; ing the device forward and reverse or backward, such means in the present embodi ment comprising a clutch C and clutch C,

the contacting or' actuating member 0 slid- 1 g 80 cured at their lower ends to opposite faces ably mounted on shaft D and the .lever L 1 and connecting rods L and L; the clutches C and O are of course operably connected with the belt pulleys driven by the belts which get their motion from the crank or drive shaft of the engine or motor, as indicated in Fig. 1. This tampingapparatus is driven forward and backward with its own power, and. the driving mechanism is so proportioned that by use of a reducing pulley on the motor which runs 1 to 4: of the crank shaft, I get different speeds forward and backward; in .the present instance the tamper runs forward at rate of seven (7) feet per minute, and then backward at rate of sixty (60) feet per minute, the engine running all the time, but the weight revolving only when the tamper is driven forward.

It will be noticed that the tamping templets or blades, are separate and independent and are connected with shaft B in such a manner that one (the rear one A) gets all the vertical jar or vibration, and no horizontal jar, and the other one (the forward one A) gets all the horizontal jar and no vertical jar. Each templet will be about two inches or less in width and does not move more .than one inch, but strikes about 600 strokes per minute. The clutch D D is for the purpose of letting one side of the apparatus go ahead in rounding curves. B

means of the chains I and I and the levers 1 L and L the templets or blades can be raised and lowered to suit varying circumstances.

It will of course be understood that when the device is in use the lower faces of the templets are supported slightly above the upper surface of the road bed upon which it is operating. I

The operation of. the device is as follows:

The apparatus having been placed across the road bed is supported by the wheels G and G on the tracks Rjwith the templets or blades A and A slightly above the concrete in its mastic state; the shaft B is now thrown into gear with the crank shaft of the engine which may be constantly running;

the shaft B is now given a high num-' ber of revolutions and the weight W beingeccentrically mounted on said shaft will cause horizontal jars to be imparted to the front templet A through the pitman P, and

at thesame time vertical jars or vibrations to the second templet or blade A through the pitman P and bracket P the entire or resilient motion through the agency of the springs S and S. It will'thus be observed that I eifectually tamp the concrete bed by peculiar motion of a pair of templets, moving simultaneously along the bed but one templet vibrated horizontally only, while the other is'vibrated vertically only. I claim m 1. The herein described method of tamping concrete beds consisting in suspending a pair of spaced apart independent templets v or blades slightly above said bed, and imparting the horizontal vibrations of an unbalanced revolving shaft to one of said templets and the verticalvibrations of the said shaft to the other of said templets.

2. The herein described method of tamping concrete roads or beds consisting in suspending a pair of independent tamping blades slightly above the bed and simultaneously imparting a horizontal vibratory motion to one'blade and a vertical vibratory motion to the other blade.

3. The herein described method of tamping concrete beds consisting in suspending across said bed a pair of independent tamp-' 4. The herein described'method of tamping concrete beds consisting in yieldingly suspending a-pair of spaced apart tamping blades slightly above said concrete bed and simultaneously translating the horizontal vibrations of a rapidly revolving weighted shaft to one of said blades and the vertical vibrations of said shaft to the other blade.

.5. The herein described method of tamp-- ing concrete beds consisting in translating the vibrations of an unbalanced revolving shaft to a pair of spaced apart tamping templets suspended in parallel planes, the vibrations imparted to one templet being directed in a horizontal direction and the vibrations imparted tp the other templet being directed in a vertical direction, the vibrations being-imparted only during a for ward'travel of said templets along the concrete bed.

6. In a concrete tamper, the combination with a pair of independently supported spaced apart tamping templets or blades,

and means for imparting horizontal vibratory motionto one templet or blade, and vertical vibratory motion to the other blade.

7. In a concrete tamper, the combination wlth a pair of spaced apart yieldingly suspended tamping templets or blades, and means for imparting a horizontal, vibratory motion to one of said templets; and a vertical vibratory motion to the other templet.

8. In a concrete tamper, the combination with a pair of spaced apart independently suspended tamping templets,

means for m'ovably supporting said templets above a road bed and across the same in shaking contact therewith, and an unbalanced motor carried by said supporting means and means for translating the vibrations of the motor.

wardly and backwardly thereon, a motor mounted thereon, an eccentrically weighted shaft driven by 'saidmotor, a pair of spaced apart tamping templets independently suspended from said frame, and means oper- 'ably connected with said weighted shaft for imparting vibrations set up by said Weighted shaft, the vibrations imparted to one templet being in a horizontal direction, 'and the vibrations imparted to the other templet being in a vertical direction.

10. A'concrete tamping device compris- *ing in combination, a wheeled frame dis posed across a concrete road bed and adapted to travel forwardly and rearwardly thereon, a motor mounted thereon, a shaft revolved by said motor, a weight eccentrically mounted on said shaft, a pair of spaced apart independently and yieldingly suspended tamping templets carried by said frame across the road bed and connections between the shaft and each templet whereby the vibrations of the said .shaft are translated to the pair of templets, the vibrations imparted to one templet being in a horizontal direction and the vibrations imparted to the other templet being in a verticaldirection. p

11. In a concrete tamper adapted to tamp concrete road beds, the combination with a wheeled frame disposed across the road bed and adapted to travel forwardly and rearwardly thereon, a motor supported on said frame, means for driving the wheeled frame from the motor, a pair of spaced apart tamping templets, yieldingly and independently suspended from said frame and in shaking contact with the 'road bed, a weighted shaft revolubly driven from said motor, a pitman connecting the weighted shaft with the tamping templets respectively whereby the horizontal vibrations of the weighted shaft are transmitted to one. of the templets and the vertical vibrations of shaft are simultaneously transmitted to the other templet. a

12. lfn'a concrete tamper, the combination with a wheeled carriage adapted to be mounted across a concreteroad bed, a pair of spaced apart tamping-templets yieldingiy to and independently suspended from said carriage across the road bed, a motormounted on said carriage, an eccentrically weighted shaft revolubly driven by said motor, pitman means' connecting saidshaftwith the ,spaced aparttemplets respectivelyto ;im-

part a horizontal vibratory motion across the road bed to the forward templet and vertical vibratory motion to the other of said templets.

13. In a device for tamping concrete road beds, the combination with a wheeled carriage disposed across said road bed and adapted to be automatically propelled for? wardly and rearwardly,the forward speed being less than the rear speed, a pair of spaced apart tamping templets yieldingly and independently suspended from saidcarriage across the road bed; a motor carried by said carriage and adapted to propel said so carriage, and means for imparting a vibratory motion horizontally to the forward templet and a vertical vibratorymotion to the rear templet, said vibratory motions be ing imparted only during the forward travel of the carriage.

14 In a concrete tamper adapted to tamp concrete road beds, the combination with a wheeled frame disposed across the road bed" and adapted to travel forwardly and rearto wardly thereon, a motor supportedon said frame, means for driving the wheeled frame from the motor, a pair of spaced apart tamping templets yieldingly and independently suspended from said frame, a revoluble shaft moving eccentrically in a circle and driven by said motor, and a pitmanconnecting the said shaft with the templets re spectively whereby thehorizontal vibrations of said shaft are transmitted to one-of the we templets and the vertical vibrations of said shaft are simultaneously transmitted to the Witnesses:

J. E. JoNns, WM. Woommrr. 

